Engine need help big time on tach installation

i cut off the wires from the light for the ashtray and hooked them to that...that waythey turn on with everything else...im not sure if thats the easiest way tho... and to do this i had to cut a hole in the top of the tach housing for the wires to come out of

it's the negative wire lead to the coil...... that is, if the tach you have is meant for a single coil setup (most are)

there should also be a wire already running to your gauges whether your car has a tach gauge set or not..... it will be the only a/c voltage back there

need help big time on tach installation

i just got a tach. can i install all the wiring using the wires attached on the cluster? or whats the easiest way on installing it.

tap the wires from the distributor, i cant recall the color of the wire but i have mine tapped there and it works wonderfully!

What year of Corolla are you trying to do this for?

99 CE. and what wires from the distributor?is it anywhere behind the dash? or is it one of the wires attached on the cluster?

Since you have multiple coil packs (2 sets) and have a distributorless system - your choices are to:

- get a tach driver (basically wires inline to the sharded 12V supply feed into the coils and output a signal that triggers most aftermarket tachs)

- or wire it into a 12V source and hope that the tach can trigger off the noise in the system (just as Live2drum suggested). The Gtech Pro meters pick up your RPMs that way - sometimes they work, sometimes they don't. Depends on how "clean" your 12V is.

Good Luck.

I am glad all I had to do was unplug my old cluster and plug in my new cluster and my tach worked on mine

im with you on replacing the cluster much easier and less effort

can i hook up the positive and negative 12v supply to the ones for the radio? then i can just stick the distributor wire one by one to the wires behind the cluster till i find the one that works?

Get a wring diagram - doing that is a sure way of shorting out something important. A 12V feed from any source and chassis ground may be all you need. Depends on the tach - otherwise you will have to get the sense wire from the ECU or find some other way to do it.

I ran the light wire to my taillight fuse, power to the battery, and the signal wire is tapped into the cluster.

or..

http://vvti.net/forums/showthread.p...ch+installation

sorry guys, i have no clue on how to install this... the only thing i installed in my car myself is a SRI... so where do i hook up the power wires? coz i got 4 wires on my tach... signal wire, positive, negative, and light...

Try this PDF - might be similar to your tach (common four wire hookup). Just connect the signal wire hookup to a good 12V source (source to coils would be best).

http://hp.autometer.com/instruction...instruction.pdf

Positive is 12v power.<br />
Negative is ground, if I remember correctly.<br />
Light determines when the backlight comes on -- I stuck the wire in with my taillight fuse in the fuse panel..when the taillights are on (ie headlights on), the backlight on the tach lights up.<br />
Signal goes either to the ECU wire as noted above, tapped into the cluster, or maybe somewhere else..I used the cluster.

thanks for all the help... so now i know where to put all the rest of the wires except for the positive wire... is there any wire going to the cluster thats a positive 12v power wire? if there is what's the color?

i gave up installing this damn thing... anyway, i just did what some of you guys suggested...i just bought a new cluster with a tach... thanks for all the help...